diff --git a/core/main.mk b/core/main.mk
index ed1815649..0fc7efb17 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -1251,6 +1251,7 @@ modules_to_install := $(sort \
     $(CUSTOM_MODULES) \
   )
 
+ifdef FULL_BUILD
 #
 # Used by the cleanup logic in soong_ui to remove files that should no longer
 # be installed.
@@ -1271,6 +1272,7 @@ $(file >$(HOST_OUT)/.installable_test_files,$(sort \
     $(test_files)))))
 
 test_files :=
+endif
 
 
 # Don't include any GNU General Public License shared objects or static